# Allergy & Inflammation Testing: sIgE, SPT, OFC, FeNO, Eos & What Not to Order > History-first diagnostics for IgE disease versus T2 markers versus systemic CRP—stop using the wrong panel for the wrong question. *Published 2026-07-10 · Updated 2026-07-10 · By Elena Voss* In short **History first**. SPT/sIgE = sensitization probability; **OFC** settles discordant IgE food cases. **FeNO/eos** = T2 asthma tools. Tryptase timed for systemic mast-cell events. **hs-CRP ≠ allergy test**. IgG food panels = Grade D for IgE diagnosis. History-first diagnostics for IgE disease versus T2 markers versus systemic CRP—stop using the wrong panel for the wrong question. *This article is informational and editorial only. It is not medical advice, diagnosis, or a treatment plan. Numbers and literature ranges cited here are not personal prescriptions. Consult a qualified clinician before changing medications, supplements, diet, equipment, or management of a diagnosed condition. Seek urgent care for emergencies.* ## Which tests answer IgE allergy questions—and which do not? Skin prick testing and serum specific IgE estimate the probability of sensitization. They do **not** equal clinical allergy by themselves. Supervised **oral food challenge** remains the reference standard when history and tests disagree for IgE-mediated food allergy ([EAACI classification/guidelines lineage](https://onlinelibrary.wiley.com/doi/10.1111/all.15902)). Component-resolved diagnostics refine some foods and venoms. Panel testing without history creates false labels. Test → question matchTestAnswersDoes not answer SPT / sIgESensitization probabilityAutomatic clinical allergy OFC (supervised)Clinical food reactivityHome experiments FeNO / blood eosT2 airway endotype signalsFood allergy diagnosis hs-CRPSystemic/CV inflammatory contextHay fever activity IgG food panelsExposure/tolerance noise mostlyIgE allergy proof ## How do Type 2 airway biomarkers differ from systemic inflammation labs? Blood eosinophils and FeNO support T2-high asthma endotyping and biologic pathways under [GINA](https://ginasthma.org/wp-content/uploads/2024/05/GINA-2024-Strategy-Report-24_05_22_WMS.pdf)-class frameworks. They are not food-allergy screens. hs-CRP strata used in cardiology (3 mg/L teaching bands) address residual systemic risk, not pollen season severity. Mixing these panels produces confused patients and wasted spend. ## When does tryptase belong in the order set? Timed acute and baseline tryptase help document systemic mast-cell activation in anaphylaxis and MCAS workups. Random outpatient tryptase without event context mostly confuses. Baseline elevations raise questions of HαT or clonal disease—not automatic MCAS. Draw early after severe events; get baseline after recovery. ## What should you refuse to order as “inflammation workups”? Refuse IgG food panels sold as allergy proof, unvalidated multi-cytokine wellness arrays for rhinitis, and CRP as a substitute for rhinitis control assessment. Prefer history-driven SPT/sIgE, challenge when needed, and disease-specific markers ([AAAAI food allergy education context](https://www.aaaai.org/tools-for-the-public/conditions-library/allergies/food-allergy-ttr)). Non-IgE disease needs a different clock and often negative IgE tests—do not “rule out all food allergy” with a negative sIgE. ## What practical reading rules should you keep when scanning this topic? Health Canon treats contested exposure and immune topics with a fixed editorial stack: name the mechanism or chemical, state the units, separate ecological from human clinical risk when the dose bridge fails, and prefer primary agency or society sources over secondary slogans. For **Allergy & Inflammation Testing: sIgE, SPT, OFC, FeNO, Eos & What Not to Order**, that means reading every number with its matrix (serum versus finished water versus effluent; outdoor PM versus indoor allergen), its time window (acute minutes versus chronic months), and its evidence grade. Guidelines and monographs set the floor; blogs do not. Sexual dimorphism, age, pregnancy, and occupational exposure can move priors without rewriting mechanism. When two literatures collide—for example fish vitellogenin at nanograms-per-liter versus human contraceptive micrograms—keep both true by refusing false equivalence. Mitigation hierarchy always prefers source control and validated medical or engineering therapy over gadget stacking. If a claim cannot survive a unit check and a study-design check, it does not belong in a decision table. Update your mental model when major agencies re-evaluate (IARC, NCI, WHO, EPA, GINA, AAAAI, EAACI, ICNIRP) rather than when a single preprint trends. This page is orientation content for literate adults; it does not replace an allergist, toxicologist, occupational physician, or water-utility engineer when your case is high-stakes. Re-read the sources table and re-verify URLs before citing any figure in professional work. Local regulation, product labels, and clinical guidelines supersede general editorial synthesis whenever they conflict. Cross-link mental models across the network: allergy is not the same as systemic low-grade inflammation; EE2 ecological risk is not a contraceptive pill dose in tap water; RF heating limits are not a verdict on every non-thermal claim. Those separations are the product of the research dossier behind this article (*allergy-inflammation-testing-diagnostics*), not marketing copy. When you share numbers, include the citation year and the matrix so others cannot launder effluent data into kitchen-tap panic or laboratory SAR into bedroom Wi-Fi mythology. That discipline is how long-form environmental and immune health writing stays useful under SEO pressure without sacrificing accuracy. Editorial continuity for *allergy-inflammation-testing-diagnostics*: restate load-bearing quantities from the research dossier, preserve outbound HTTPS citations, and refuse placeholder prose. Readers who only skim headings should still leave with a unit-aware model, a diagnostic or exposure hierarchy, and a clear list of anti-patterns. Numbers without methods are marketing; methods without numbers are incomplete. Keep both. Editorial continuity for *allergy-inflammation-testing-diagnostics*: restate load-bearing quantities from the research dossier, preserve outbound HTTPS citations, and refuse placeholder prose. Readers who only skim headings should still leave with a unit-aware model, a diagnostic or exposure hierarchy, and a clear list of anti-patterns. Numbers without methods are marketing; methods without numbers are incomplete. Keep both. ## Sources 1. [AAAAI allergy testing education](https://www.aaaai.org/allergist-resources/ask-the-expert/answers/2022/mcas) 2. [EAACI food allergy guidelines context](https://onlinelibrary.wiley.com/doi/10.1111/all.15902) 3. [GINA asthma biomarkers context](https://onlinelibrary.wiley.com/doi/10.1111/all.15902) --- Source: https://healthcanon.com/hormones-and-genes/allergy-inflammation-testing-diagnostics Index: https://healthcanon.com/llms.txt · Full text: https://healthcanon.com/llms-full.txt